sharedDataSources

I improved my code. I am providing sandcastle code below. As you can see when I add a plane with DataSource structure it does not display on both viewers. It only displays points on both. And other entities that I add to viewers separately does displays without any problem.

Code:
https://sandcastle.cesium.com/#c=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